<template>
  <li>
    <label>
      <input
        type="checkbox"
        :checked="todo.done"
        @change="handleCheck(todo.id)"
      />
      <!-- 如下代码也能实现功能，但是不太推荐，因为Vue不建议更改props传入的数据，当修改对象中单个值时，Vue监测不到 -->
      <!-- <input type="checkbox" v-model="todo.done"/> -->
      <span>{{ todo.title }}</span>
    </label>
    <button class="btn btn-danger" @click="handleDelete(todo.id)">删除</button>
  </li>
</template>

<script>
export default {
  name: "MyItem",
  props: ["todo"],
  mounted() {
    this.$bus.$on("checkTodo", () => {
      this.todos.forEach((todo) => {
        if (todo.id == id) todo.done = !todo.done;
      });
    }),
      this.$bus.$on("deleteTodo", () => {
        this.todos = this.todos.filter((todo) => {
          return todo.id !== id;
        });
      });
  },
  methods: {
    handleCheck(id) {
      // 通知APP组件将对应todo对象的done值取反 =>回到APP组件 数据在哪，操作在哪
      // this.checkTodo(id);
      this.$bus.$emit('checkTodo',id)
    },
    handleDelete(id) {
      if (confirm("确认删除吗")) {
        // this.deleteTodo(id);
        this.$bus.$emit('deleteTodo',id)
      }
    },
  },
};
</script>

<style scoped>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  margin-bottom: 10px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
  margin-right:10px ;
}

li label input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}
li:hover {
  background-color: #ddd;
}
li:hover button {
  display: block;
}
</style>